Rotating a matrix by 90 degree

RotationMatrix90.py

pixel = [ [0,1,2,3],
          [10,11,12,13],
          [20,21,22,23],
          [30,31,32,33] ]
          
          
def rotateMatrix90(pixel):
    pixel_temp = [[0]*4 for _ in range(4)]
    print(pixel_temp)
    for x in range(4):
        for y in range(4):
            pixel_temp[x][y] = pixel[3-y][x]
    return pixel_temp



for x in range(4):
    print("");
    for y in range(4):
        print(" %2d" %pixel[x][y], end="")
print(" ")
pixel = rotateMatrix90(pixel)
for x in range(4):
    print("");
    for y in range(4):
        print(" %2d" %pixel[x][y], end="")
print("")